CN1208601C - Quality flow speed/density sensor with single curve measuring tube - Google Patents
Quality flow speed/density sensor with single curve measuring tube Download PDFInfo
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- CN1208601C CN1208601C CNB011165995A CN01116599A CN1208601C CN 1208601 C CN1208601 C CN 1208601C CN B011165995 A CNB011165995 A CN B011165995A CN 01116599 A CN01116599 A CN 01116599A CN 1208601 C CN1208601 C CN 1208601C
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- plane
- pipeline section
- fixed
- axis
- mass flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
- G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
- G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
- G01F1/8418—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments motion or vibration balancing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
- G01F1/8468—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits
- G01F1/8472—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
A mass flow/density sensor having a single flexural measurement pipe, comprises a V-shaped pipe(1), bending in a plane and comprising an inlet piece (11), an outlet piece (12), an inlet arc (13), an outlet arc (14), a top arc (15), and corresponding piece(16, 17) between the inlet arc and the outlet arc. So, the distance between the top of the top arc and the inlet/outlet arc can be enlarged at will; and still high measurement accuracy can be obtained, such as +-0.5%. Two clamping elements(2,3) clamp on the pipe piece to limit the measurement length of the pipe piece forming the measurement pipe. The corresponding plan elements(31,32) are fixed on the clamping elements(2, 3). A relative action part(41) fixed on a plane, extends to the top arc along a symmetrical axis line, where the top arc supports the first part of stimulator assembly(50) or an earthquake stimulator(50') simulating the pipe pieces with the third mode which has a relative natural frequency of f3. A sensor support element(61) parallel with the pipe piece(16) and a sensor support element(62) parallel with the pipe piece(17) are fixed on a plane(31). Corresponding speed or displacement sensors(71, 72) are fixed on the pipe pieces and the sensor support. The inlet piece and the outlet piece are supported by a rack(35), a housing(8) is fixed on the rack(35).
Description
Technical field
The present invention relates to a kind of mass velocity-density sensor-, be used to detect the mass velocity and/or the density of the liquid that at least temporarily flows through pipeline hereinafter referred to as Coriolis mass flow speed-density sensor according to the work of Coriolis principle; Coriolis mass flow speed-density sensor is inserted in the pipeline and to compress mode and for example is installed in the pipeline by flange.
Background technology
WO-A99/51946, in conjunction with Fig. 9 and 10, disclose a kind of Coriolis mass flow speed sensors especially, it still is a density sensor certainly, it is designed to can be installed in the pipeline that at least temporarily flows through liquid, has with respect to the axis of symmetry at single measuring tube of a plane inner bending and comprise:
-straight inflow segment, it flows into axis and is positioned at described plane;
-direct current the section of going out, its flow out axis be positioned at described plane and with described inflow axial alignment;
-inflow bend pipe;
-outflow bend pipe;
-top elbows,
-described inflow segment and described inflow bend pipe are seamless link, and described outflow section and described outflow bend pipe are seamless link; And
-described inflow segment and described top elbows seamless link, described top elbows and the seamless link of described outflow bend pipe;
--first and second cramping bodies are clamped on the inflow segment toward each other measures length range to limit first of formation measuring tube pipeline section,
--third and fourth cramping body is clamped in the outflow section toward each other and upward measures length range to limit second,
--each cramping body has the inside surface that leans against on the measuring tube and away from the outside surface of described inside surface and measuring tube,
---described first and second cramping bodies have the inflow side first sensor support member that is fixed thereon, its longitudinal axis and inflow parallel axes, and
Outflow side second sensor support that---described third and fourth cramping body is fixed thereon, its longitudinal axis and outflow parallel axes,
--described top elbows has the seismic stimulation device that is fixed thereon,
--if full of liquid in the-pipeline section, then driver is f with relevant natural frequency
3The 3rd vibration mode excitation pipeline section, frequency f
3Be approximately 500 to 1000Hz,
--first speed or displacement transducer are fixed on the position of first sensor support member and inflow segment, be fixed on the position of second sensor support and outflow section with second speed or displacement transducer, in its present position, if with the 3rd vibration mode excitation pipeline section, by having for first and second zero points respectively from the caused pipeline section deflection of the interference of pipeline.
The design concept of the Coriolis mass flow speed sensors of prior art only allows top elbows to have big radius-of-curvature, and perhaps in other words, the distance between top and inflow/outflow axis only is about 10cm.For bigger distance, particularly specify distance greater than 10cm, disclosed design concept is just inapplicable among the WO-A99/51946.
Summary of the invention
Therefore the purpose of this invention is to provide a kind of Coriolis mass flow speed sensors that can strengthen arbitrarily according to design concept and top top elbows and the distance between inflow/outflow axis of above-mentioned prior art.Simultaneously can obtain high measurement accuracy, as be about ± 0.5% precision.
For realizing these purposes, first kind of distortion of the present invention comprises a kind of Coriolis mass flow speed sensors that is installed on the pipeline that at least temporarily flows through liquid, described Coriolis mass flow speed sensors is included in the plane with respect to the single V-arrangement measuring tube of axis of symmetry bending, also comprises:
-straight inflow segment, it flows into axis and is positioned at described plane;
-direct current the section of going out, its flow out axis be positioned at described plane and with described inflow axial alignment;
-inflow bend pipe;
-outflow bend pipe;
-top elbows,
--described inflow segment and described inflow bend pipe are seamless link, and described outflow section and described outflow bend pipe are seamless link;
-straight first pipeline section, it seamlessly will flow into bend pipe and described top elbows couples together; And
-straight second pipeline section, it seamlessly will flow out bend pipe and described top elbows couples together: and
--first and second cramping bodies are clamped in to flow near first pipeline section of bend pipe toward each other measures length range to limit first of formation measuring tube pipeline section,
--third and fourth cramping body is clamped in to flow out near second pipeline section of bend pipe toward each other measures length range to limit second,
--each cramping body has the inside surface that leans against on the measuring tube and away from the outside surface of described inside surface and measuring tube,
--the outside surface of the-the first and the 3rd cramping body has first plane body that is connected thereto, and
--the outside surface of the-the second and the 4th cramping body has second plane body that is connected thereto,
----two plane bodies are threaded togather and are threaded on the cramping body, make first keeper be inserted in the first long side place, and second keeper is inserted in the second long side place,
----two plane bodies have relativity body fixed thereon, and described relativity body extends to top elbows along the axis of symmetry, and top elbows supports the first of exciter assembly, and exciter assembly has main axis and is fixed to the second portion of top elbows;
----exciter assembly is f with relevant natural frequency
3The 3rd vibration mode excitation pipeline section:
----inflow side first sensor support member and outflow side second sensor support are fixed on first plane body, the longitudinal axis of described inflow side first sensor support member is parallel to first pipeline section, the longitudinal axis of described outflow side second sensor support is parallel to second pipeline section, and
----inflow side first support and outflow side second support are fixed on second plane body, and the longitudinal axis of described inflow side first support is parallel to described first sensor support member, and the longitudinal axis of described outflow side second support is parallel to described second sensor support,
--first speed or displacement transducer are fixed on first pipeline section and the first sensor support member, second speed or displacement transducer are fixed on second pipeline section and second sensor support, in its present position, if with the 3rd vibration mode excitation pipeline section, had for first and second zero points respectively by deflection from the caused pipeline section of interference of pipeline, and
--described inflow segment and described outflow section be by the support member support,
--fix a housing on the-carriage, housing is connected on the support by first keeper relative with first speed or displacement transducer and second keeper relative with second speed or displacement transducer respectively.
For achieving the above object, second kind of distortion of the present invention comprises a kind of Coriolis mass flow speed sensors that is installed on the pipeline that at least temporarily flows through liquid, described Coriolis mass flow speed sensors is included in the plane with respect to the single V-arrangement measuring tube of axis of symmetry bending, also comprises:
-straight inflow segment, it flows into axis and is positioned at described plane;
-direct current the section of going out, its flow out axis be positioned at described plane and with described inflow axial alignment;
-inflow bend pipe;
-outflow bend pipe;
-top elbows,
--described inflow segment and described inflow bend pipe are seamless link, and described outflow section and described outflow bend pipe are seamless link;
-straight first pipeline section, it will flow into bend pipe by seamless link and described top elbows couples together; And
-straight second pipeline section, it will flow out bend pipe by seamless link and described top elbows couples together: and
--first and second cramping bodies are clamped in to flow near first pipeline section of bend pipe toward each other measures length range to limit first of formation measuring tube pipeline section,
--third and fourth cramping body is clamped near second pipeline section that flows out the bend pipe relatively by this measures length range to limit second,
--each cramping body has the inside surface that leans against on the measuring tube and away from the outside surface of described inside surface and measuring tube,
--the outside surface of the-the first and the 3rd cramping body has first plane body that is connected thereto, and
--the outside surface of the-the second and the 4th cramping body has second plane body that is connected thereto,
----two plane bodies are threaded togather and are threaded on the cramping body, make first keeper be inserted in the first long side place, and second keeper is plugged on the second long side place,
----relativity body is fixed on two plane bodies, and described relativity body extends and do not extend to top elbows to top elbows along the axis of symmetry,
----inflow side first sensor support member and outflow side second sensor support are fixed on first plane body, the longitudinal axis of described inflow side first sensor support member is parallel to first pipeline section, the longitudinal axis of described outflow side second sensor support is parallel to second pipeline section, and
----inflow side first support and outflow side second support are fixed on second plane body, and the longitudinal axis of described inflow side first support is parallel to described first sensor support member, and the longitudinal axis of described outflow side second support is parallel to described second sensor support,
--top elbows has the seismic stimulation device that is fixed thereon,
---seismic stimulation device is f with relevant natural frequency
3The 3rd vibration mode encourage described pipeline section,
--first speed or displacement transducer are fixed on first pipeline section and the first sensor support member, first sensor support member and second speed or displacement transducer are fixed on second pipeline section and second sensor support, in its present position, if with the 3rd vibration mode excitation pipeline section, had for first and second zero points respectively by deflection from the caused pipeline section of interference of pipeline, and
--described inflow segment and described outflow section be by the carriage support,
--fix a housing on the-carriage, housing is connected on the support by first keeper relative with first speed or displacement transducer and second keeper relative with second speed or displacement transducer respectively.
First of two kinds of modification kind of improvement according to the present invention, first additional materials is fixed near first pipeline section of top elbows, approximately produce the node of the 3rd vibration mode herein, and second additional materials is fixed on second pipeline section with respect to axis of symmetry symmetry.
In the present invention and/or its first kind improved first preferred embodiment, exciter assembly is fixed on top elbows and the relativity body by this way, and promptly the main axis of exciter assembly extends on the direction perpendicular to the top elbows diameter of the axis of symmetry.
In the present invention and/or its first kind improved second preferred embodiment, exciter assembly is fixed on top elbows and the relativity body by this way, and promptly the main axis of exciter assembly extends on being parallel to perpendicular to the direction of the top elbows diameter of the axis of symmetry and between top elbows and housing.
Second of two kinds of modification kind of improvement according to the present invention, a compensation body is fixed near the relativity body of plane body, and the longitudinal axis of compensation body is perpendicular to the axis of symmetry, and the compensation body and function makes the coriolis mode mobile equilibrium that belongs to the 3rd vibration mode.
The third improvement of two kinds of modification according to the present invention, described two plane bodies and described first keeper have first groove along the described axis of symmetry, described two plane bodies, second keeper and relativity body have second groove along symmetrical grooves, form corresponding torsional part.
In the third improved preferred example of the present invention, described torsional part is designed to common swivel adapter head.
In the preferred embodiment of two kinds of modification of the present invention, the first, second, third and the 4th cramping body has equal in quality.
In two kinds of modification of the present invention and improved another preferred embodiment thereof, housing is made of the planar metal thin plate and comprises:
-have a preceding thin plate of first mid-plane;
-have a back thin plate of second mid-plane;
-have a top lip of the 3rd mid-plane;
-have first a side thin plate of the 4th mid-plane; And
-have second a side thin plate of the 5th mid-plane,
--the first middle part plane parallel is in described first pipeline section,
--the second middle part plane parallel is in described second pipeline section,
--in the 3rd facial planes perpendicular to described plane,
--the 4th and the 5th middle part plane parallel is in described plane body, and
--the back thin plate is fastened on the described support by keeper.
Advantage of the present invention is to obtain a kind of Coriolis mass flow speed sensors, makes its length overall promptly be significantly smaller than the length overall that disclosed prior art is provided with among the WO-A99/51946 along the length of inflow/outflow axis.This is because measuring tube is a V-arrangement.Therefore obtain a kind of small and exquisite sensor with desired measuring accuracy.
Another advantage of the present invention is to have improved effect, and this is that to adopt prior art that institute is set inaccessiable.This effect is, because cramping body only mechanically interconnects by measuring tube, but otherwise be independently, measuring tube can be by from the Analysis of Pipe Vibrations excitation and vibrate with the frequency that is lower than the three-mode frequency.These low-frequency vibrations, the vibration of similar three-mode is converted to electric signal and is included in this electric signal as undesired signal by sensor.In according to of the present invention the setting, the cramping body in the inflow side carries out substantially rigid by plane body with the clamping of outflow side and is connected, and in fact therefore the excitation of low-frequency vibration can not be arranged.
Description of drawings
By the reference accompanying drawing embodiment is described and can better understand the present invention, wherein the corresponding component in each accompanying drawing is represented by same numeral, if but suitable such label can only repeat expression once, wherein:
Fig. 1 is the partial longitudinal section of the Coriolis mass flow speed sensors of first embodiment of the invention;
Fig. 2 is the partial side sectional view along the line I-I among Fig. 1;
Fig. 3 is another partial longitudinal section of Coriolis mass flow speed sensors of not showing Fig. 1 of parts in the displayed map 1;
Fig. 4 is the partial longitudinal section of the Coriolis mass flow speed sensors of second embodiment of the invention;
Fig. 5 is the partial side sectional view along the line II-II among Fig. 4; And
Fig. 6 has shown the longitudinal diagram of second embodiment of the invention in the mode identical with Fig. 3;
Because the present invention can have various distortion, therefore show and describe several embodiment in detail by the example among the figure.But should be appreciated that, the invention is not restricted to these disclosed particular forms, on the contrary, the present invention includes all and drop on distortion, equivalent and change in the spirit and scope of the invention that limits by accessory claim.
Embodiment
Fig. 1 and Fig. 3 show the partial longitudinal section according to the Coriolis mass flow speed sensors 10 of first embodiment of the invention.Some parts of following housing in Fig. 1, have been saved, therefore the inner structure that can see this Coriolis mass flow speed sensors.In Fig. 3, some inner structure parts of Fig. 1 save, and make the parts that blocked by these parts in Fig. 1 also expose.Fig. 2 is the fragmentary cross-sectional view along the I-I among Fig. 1.Be described referring now to Fig. 1 to Fig. 3.
Coriolis mass flow speed sensors 10 is included in the plane the single measuring tube 1 with respect to the crooked forming V-shape of axis of symmetry I-I, sees Fig. 1, and this plane promptly is a paper, and this straight line I-I still obtains the profile line in Fig. 2 cross section.Measuring tube 1 has straight inflow segment 11, and this straight inflow segment 11 has the inflow axis that is positioned at the plane.In addition, measuring tube 1 has the direct current section of going out 12, this direct current section of going out have be positioned at this plane and with flow into axis outflow axis in line.Coriolis mass flow speed sensors 10 just can be installed on the straight tube like this.
Measuring tube 1 also comprises inflow bend pipe 13, flows out bend pipe 14 and top elbows 15.Inflow segment 11 and flow out section 12 respectively with flow into bend pipe 13 and flow out bend pipe 14 seamless links.
Measuring tube 1 also comprises first straight length 16 and second straight length 17.Pipeline section 16 connect flow into bend pipes 13 and with top elbows 15 seamless links, pipeline section 17 connect flow out bend pipes 14 and with top elbows 15 seamless links, make measuring tube 1 form a separate part and on suitable bending machine, form by a straight length bending.Because measuring tube 1 curved V-arrangement, promptly because measuring tube 1 is not straight, so measuring tube 1 be easy to by steel particularly high-quality steel make.
In an illustrated embodiment, the end of inflow segment 11 has first flange 110, and the end of flowing out section 12 has second flange 120.Described like that by beginning, be installed in herein hermetically in Coriolis mass flow speed sensors 10 tubular stingers and by flange 110,120.
The end that surrounds the lining 111 of inflow segment 11 is in the inside surface of flange 110.The effect of lining 111 is to strengthen inflow segment 11 and be installed on the inflow segment 11 by mechanical pressure, and sealing ring 112 is inserted between inflow segment 11 and the lining 111.
The end that surrounds the lining 121 that flows out section 12 is in the inside surface of flange 120 in the same manner.The effect of lining 121 is strengthen to flow out section 12 and be installed in by press fit to flow out on the section 12, and sealing ring 122 is inserted in and flows out between section 12 and the lining 121.
First and second cramping bodies are clamped near the pipeline section 16 that flows into the bend pipe 13 toward each other; In Fig. 2, owing to covered first and second cramping bodies, therefore can't see these cramping bodies, but in Fig. 3, only to see second cramping body 22.These two cramping bodies constitute first pair of cramping body 2 and define the first measurement length range that forms measuring tube 1 pipeline section.
Third and fourth cramping body 23,24 is clamped near the pipeline section 17 that flows out the bend pipe 14 toward each other; In Fig. 2, two cramping bodies 23,24 all can be seen, still in Fig. 3, only to see the 4th cramping body 24.These two cramping bodies 23,24 constitute second pair of cramping body 3 and define the second measurement length range that forms measuring tube 1 pipeline section.Four cramping bodies preferably have equal in quality.
In Fig. 3, measure length is extended to second pair of cramping body 3 by the lower limb of first pair of cramping body 2 lower limb; These cramping bodies to 2,3 define vibrate at work and when fluid flows through on it effect the pipeline section of Coriolis force is arranged.
Each cramping body has the inside surface that leans against outer wall shape on the measuring tube 1 and that adapt to measuring tube 1, and has the outside surface away from inside surface and measuring tube 1, and this outside surface is the plane preferably.First plane body 31 is installed on the outside surface of first cramping body and the 3rd cramping body 23, and second plane body 32 is installed on the outside surface of the second and the 4th cramping body 22,24.
Two plane bodies 31,32 are fixed together and are clamped on the cramping body, and first keeper 33 is inserted in first long side, and second keeper 34 is inserted in second long side.By clamping element, a screw 311 is as shown in FIG. realized above-mentioned clamping.
The thickness of keeper 33,34 and clamping therebetween have the thickness of the cramping body 2,3 of measuring tube 1 to adapt each other, make two plane bodies be clamped together and in fact do not produce twisting resistance.In addition, the thickness of every pair of cramping body 2,3 is adapted to the external diameter of measuring tube 1, makes that the associating cramping body clamps measuring tube and make the inside surface of cramping body to lean against on the outer wall of measuring tube 1.
In the preferred embodiment of first kind of modification of the present invention, exciter assembly 50 is fixed on top elbows 15 and the relativity body 41 by this way, the main axis 53 that is exciter assembly 50 extends in the diametric(al) of top elbows 15, this diameter is perpendicular to axis of symmetry I-I, as shown in Figures 1 to 3.
In another preferred embodiment of first kind of modification of the present invention, exciter assembly 50 is fixed on top elbows 15 and the relativity body 41 by this way, promptly the main axis 53 of exciter assembly 50 be parallel to the diametric(al) of top elbows 15 and be positioned at top elbows 15 and housing 8 (as follows) between; For simplicity and do not show.This set has improved the efficient of exciter assembly 50; For example, if the main axis 53 of exciter assembly 50 with respect to the diameter of the about measuring tube 1 of the position change shown in Fig. 1 to 3 then efficient can improve about 25%.
The 3rd vibration mode is the pipeline section vibration that only forms two node and three antinodes between two pairs of cramping bodies 2,3 simultaneously, and one of three antinodes are in top elbows 15; Three-mode has related natural frequency f
3And can be comparable to the second harmonic of vibrating spring.
On the contrary, second pattern is the pipeline section vibration that only is formed at the single node and two antinodes at top elbows 15 places between two pairs of cramping bodies 2,3 simultaneously.Second pattern has natural frequency f
2And can be comparable to the first harmonic of vibrating spring.
In the present invention, the natural frequency f of three-mode
3About 5 times to the frequency values of first pattern, first pattern is the f with natural frequency
1Basic model.Basic model has the single antinode that is in top elbows 15 and do not have node between cramping body is to 2,3.
Except according to the present invention at natural frequency f
3Outside the three-mode of excitation, when liquid flow, obtaining above-mentioned second pattern is f with corresponding natural frequency
4Four-mode; These two kinds of patterns are referred to as coriolis mode.In the present invention, natural frequency f
2, f
4Be approximately following numerical value:
f
2≈0.6f
3；f
4≈1.7f
3
Below illustrated sensor generally do not gather separately and have two natural frequency f
2, f
4Signal, produce the natural frequency f that only has three-mode when sensor 71,72
3Signal after, 1 of measuring tube is vibration herein, but these two coriolis modes cause the phase change between the sensor signal, this is a standard of weighing the mass velocity-density of the liquid that flows through measuring tube 1.
The effect of relativity body 41 is three-modes of balancing side buret 1; Relativity body 41 and measuring tube 1 with the identical frequency of reality but phase place vibrate on the contrary.
Inflow side first sensor support member 61 and outflow side second sensor support 62 are installed on the plane body 31, and the longitudinal axis of support member 61 is parallel to pipeline section 16, and the longitudinal axis of support member 62 is parallel to pipeline section 17.
Inflow side first support and outflow side second support 64 are fixed on the plane body 32, and the longitudinal axis that the longitudinal axis of first support is parallel to sensor support 61, the second supports 64 is parallel to sensor support 62.Can't see first support in Fig. 1 to 3, because first support preferably is covered, but first support becomes the minute surface symmetry also therefore to become the mirror image of support 64 with respect to axis of symmetry I-I.
First speed or shifter 71 are fixed on pipeline section 16 and the sensor support 61, second speed or displacement transducer 72 are fixed on pipeline section 17 and the sensor support 62, at its place, location, if with three-mode excitation pipeline section, the interference that is produced by pipe makes pipeline section deflection, and this deflection has first, second zero point respectively.
Be easy to determine the position at these zero points on the pipeline section 16 and 17 by rule of thumb:,, be positioned at zero point apart from cramping body to the identical place of 2,3 distances promptly at the middle part of measuring length when exciter assembly 50 is fixed on the top of top elbows 15; If single measuring tube, this distance is approximately 0.21 times measurement length.The relevant position at this zero point not relevant position with the node of three-mode is relevant, and promptly these positions are independently of one another.
Can't see first keeper in Fig. 1 to 3, because first keeper has been covered, but first keeper preferably becomes the minute surface symmetry with respect to axis of symmetry I-I, therefore can become the mirror image of keeper 92.
In a preferred embodiment of the invention, housing 8 comprises preferably welding or soldering flat metal sheets together.Housing 8 comprises preceding thin plate 81, the back thin plate 82 with second mid-plane with first mid-plane, the top lip 85 with the 3rd mid-plane, the second side thin plate 84 that has the first side thin plate 83 of the 4th mid-plane and have the 5th mid-plane.
First mid-plane is parallel to pipeline section 16, the second mid-planes and is parallel to pipeline section 17.The 3rd mid-plane is perpendicular to the above-mentioned plane that makes measuring tube 1 bending.The the 4th and the 5th mid-plane is parallel to plane body 31,32, and back thin plate 82 is fixed on the support by keeper.
In Fig. 3, show the improvement of first kind of modification of the present invention with dot-and-dash line.First additional materials 161 is fixed near on first pipeline section 16 of top elbows 15, approximately is in some place that the 3rd vibration mode node takes place, and second additional materials 171 is symmetrical fixing with respect to axis of symmetry I-I.By rule of thumb or by calculating the position of determining node easily, because the exact position of additional materials is unimportant.
By additional materials 161,171, when comparing with the setting that does not have additional materials, the position of above-mentioned node is along measuring tube 1 slight change.Owing to have additional materials 161,171, to compare with the setting that does not have additional materials, the efficient of exciter assembly 50 can have sizable raising.Measurement shows and can bring up to more than 50%.
If except that additional materials 161,171, exciter assembly 50 is fixed on top elbows and the relativity body by this way, be the diameter that the main axis 53 of exciter assembly 50 is parallel to top elbows 15, then adopt the preferred setting of above-mentioned driver to can further improve the efficient of exciter assembly 50.
Fig. 4 is the partial longitudinal section of the Coriolis mass flow speed sensors 10 ' of second kind of modification according to the present invention, and Fig. 5 is the part sectioned view along the line II-II of Fig. 4.The visible parts of Figure 4 and 5 corresponds respectively to the visible parts among Fig. 1 and 2.In Figure 4 and 5, same numeral is used for representing the same parts corresponding to Fig. 1 to 3, but these labels have " ' ".
Second kind of modification of the present invention is different from first kind of modification, and wherein relativity body 41 ' does not extend to top elbows 15 ', but stops before extending in arrival top elbows 15 '.
Therefore, in second kind of modification of the present invention, can use the exciter assembly 50 that replaces Fig. 1 to 3 as the seismic stimulation device 50 ' that is described in detail among the above-mentioned disclosed PCT application WO99/51946.
Extend beyond the point of fixity at plane body 31,32 places among Fig. 1 to 3 and be in respective planes body 31 ' in the Figure 4 and 5,32 ' relativity body 41,41 ' length, relativity body 41,41 ' 3D shape and relativity body 41,41 ' quality by Coriolis mass flow speed sensors 10,10 ' size decision, particularly by measuring tube 1,1 ' nominal bore decision, by wall thickness with by measuring tube 1,1 ' quality decision, and by the quality decision of cramping body, keeper and plane body.
According at work promptly along with measuring tube 1,1 ' vibration at inflow segment 11,11 ' and/or flange 110,110 ' and flowing out section 12,12 ' and/or the working stamndard do not vibrated of flange 120,120 ', the nominal bore of Coriolis mass flow speed sensors 10, each requirement of 10 ' is determined length, 3D shape and relativity body 41,41 ' quality.
Can by being installed at the respective flange position, acceleration transducer determine non-vibrating situation by rule of thumb.But better method is to adopt the finite element program to go up designated size at relativity body 41,41 '.
In Fig. 3, represented further improvement of the present invention by dot-and-dash line, it can be used for two kinds of modification of the present invention.Near plane body 31,32, compensation body 411 is fixed on the relativity body 41.The longitudinal axis of compensation body 411 is perpendicular to axis of symmetry I-I.The above-mentioned Coriolis frequency f that belongs to the 3rd vibration mode of compensation 411 dynamic balances of body
cThe effect of pattern, and vibrate under 180 ° of frequencies of phase place with relativity body 41.Can be again size or adopt finite element program to determine size, 3D shape and the quality of compensation body 411 rule of thumb.
Fig. 6 has shown another improved part longitudinal diagram of two kinds of modification of the present invention in the mode identical with Fig. 3.Can only see among Fig. 6 that plane body 32, two plane bodies in two plane bodies and keeper 33 have first groove 36 along axis of symmetry I-I.
In addition, two plane bodies, keeper 34 and relativity body have second groove 37 along axis of symmetry I-I.Groove 36,37 extends to the point of reserving torsional part in each plane body toward each other, can see torsional part 38 wherein in Fig. 6.Preferably two torsional parts are designed to a steering knuckle.Because groove 37 also extends through the relativity body, and relativity body separated into two parts 411,412.
The improvement of Fig. 6 also plays dynamic balance coriolis mode, and this is because these parts that are in Fig. 6 left side that torsional part allows plane body move around for 180 ° with the coriolis mode of measuring tube 1 left side about phase place.
The measurement path circuitry that is used for being processed into to the divider chain of seismic stimulation device 50 ' or exciter assembly 50 power supplies and the voltage that is used for being provided by sensor 71,72 mass velocity and density signal does not constitute ingredient of the present invention, has not therefore just explained here.Can use the circuit that is used for above-mentioned purpose, those skilled in the art has been familiar with very early to this.
Show in detail and described the present invention by accompanying drawing and above-mentioned explanation; this diagrammatic sketch and explanation can be regarded example as rather than to the restriction of feature; be appreciated that only to show here and embodiment has been described, and what will protect is that institute in the present invention's spirit scope changes and modification.
Claims (16)
1. Coriolis mass flow speed sensors that is installed on the pipeline that at least temporarily flows through liquid, described Coriolis mass flow speed sensors are included in the plane with respect to the single V-arrangement measuring tube of axis of symmetry bending, also comprise:
-straight inflow segment, it flows into axis and is positioned at described plane;
-direct current the section of going out, its flow out axis be positioned at described plane and with described inflow axial alignment;
-inflow bend pipe;
-outflow bend pipe;
-top elbows,
--described straight inflow segment and described inflow bend pipe are seamless link, and the described direct current section of going out is seamless link with described outflow bend pipe;
-straight first pipeline section, it seamlessly will flow into bend pipe and described top elbows couples together; And
-straight second pipeline section, it seamlessly will flow out bend pipe and described top elbows couples together; And
--first and second cramping bodies are clamped in to flow near first pipeline section of bend pipe toward each other measures length range to limit first of formation measuring tube pipeline section,
--third and fourth cramping body is clamped in to flow out near second pipeline section of bend pipe toward each other measures length range to limit second,
--each cramping body has the inside surface that leans against on the measuring tube and away from the outside surface of described inside surface and measuring tube,
--the outside surface of the-the first and the 3rd cramping body has first plane body that is connected thereto, and
--the outside surface of the-the second and the 4th cramping body has second plane body that is connected thereto,
----two plane bodies are threaded togather and are threaded on the cramping body, make first keeper be inserted in the first long side place, and second keeper is inserted in the second long side place,
----two plane bodies have relativity body fixed thereon, and described relativity body extends to top elbows along the axis of symmetry, and top elbows supports the first of exciter assembly, and exciter assembly has main axis and is fixed to the second portion of top elbows;
----exciter assembly is with at relevant natural frequency f
3The 3rd vibration mode excitation pipeline section;
----inflow side first sensor support member and outflow side second sensor support are fixed on first plane body, the longitudinal axis of described inflow side first sensor support member is parallel to first pipeline section, the longitudinal axis of described outflow side second sensor support is parallel to second pipeline section, and
----inflow side first support and outflow side second support are fixed on second plane body, and the longitudinal axis of described inflow side first support is parallel to described first sensor support member, and the longitudinal axis of described outflow side second support is parallel to described second sensor support,
--first speed or displacement transducer are fixed on first pipeline section and the first sensor support member, second speed or displacement transducer are fixed on second pipeline section and second sensor support, in its present position, if with the 3rd vibration mode excitation pipeline section, had for first and second zero points respectively by deflection from the caused pipeline section of interference of pipeline, and
--described straight inflow segment and the described direct current section of going out be by the carriage support,
--fix a housing on the-carriage, housing is connected on the support by first keeper relative with first speed or displacement transducer and second keeper relative with second speed or displacement transducer respectively.
2. Coriolis mass flow speed sensors as claimed in claim 1, it is characterized in that, first additional materials is fixed near straight first pipeline section of top elbows, produce the node of the 3rd vibration mode herein, and second additional materials is fixed on straight second pipeline section with respect to axis of symmetry symmetry.
3. Coriolis mass flow speed sensors as claimed in claim 1, it is characterized in that, exciter assembly is fixed on top elbows and the relativity body by this way, and promptly the main axis of exciter assembly extends on the direction perpendicular to the top elbows diameter of the axis of symmetry.
4. Coriolis mass flow speed sensors as claimed in claim 1, it is characterized in that, exciter assembly is fixed on top elbows and the relativity body by this way, and promptly the main axis of exciter assembly extends on being parallel to perpendicular to the direction of the top elbows diameter of the axis of symmetry and between top elbows and housing.
5. Coriolis mass flow speed sensors as claimed in claim 1, it is characterized in that, one compensation body is fixed near the relativity body of plane body, and the longitudinal axis of compensation body is perpendicular to the axis of symmetry, and the compensation body and function makes the coriolis mode mobile equilibrium that belongs to the 3rd vibration mode.
6. Coriolis mass flow speed sensors as claimed in claim 1, it is characterized in that, described two plane bodies and described first keeper have first groove along the described axis of symmetry, described two plane bodies, second keeper and relativity body have second groove along symmetrical grooves, form corresponding torsional part.
7. Coriolis mass flow speed sensors as claimed in claim 1 is characterized in that described torsional part is designed to common swivel adapter head.
8. Coriolis mass flow speed sensors as claimed in claim 1 is characterized in that, the first, second, third and the 4th cramping body has equal in quality.
9. Coriolis mass flow speed sensors as claimed in claim 1 is characterized in that, housing is made of the planar metal thin plate and comprises:
-have a preceding thin plate of first mid-plane;
-have a back thin plate of second mid-plane;
-have a top lip of the 3rd mid-plane;
-have first a side thin plate of the 4th mid-plane; And
-have second a side thin plate of the 5th mid-plane,
--the first middle part plane parallel is in described straight first pipeline section,
--the second middle part plane parallel is in described straight second pipeline section,
--in the 3rd facial planes perpendicular to described plane,
--the 4th and the 5th middle part plane parallel is in described plane body, and
--the back thin plate is fastened on the described support by keeper.
10. Coriolis mass flow speed sensors that is installed on the pipeline that at least temporarily flows through liquid, described Coriolis mass flow speed sensors are included in the plane with respect to the single V-arrangement measuring tube of axis of symmetry bending, also comprise:
-straight inflow segment, it flows into axis and is positioned at described plane;
-direct current the section of going out, its flow out axis be positioned at described plane and with described inflow axial alignment;
-inflow bend pipe;
-outflow bend pipe;
-top elbows,
--it is seamless link that described straight inflow segment and described direct current are gone into bend pipe, and described outflow section and described outflow bend pipe are seamless link;
-straight first pipeline section, it seamlessly will flow into bend pipe and described top elbows couples together; And
-straight second pipeline section, it seamlessly will flow out bend pipe and described top elbows couples together; And
--first and second cramping bodies are clamped in to flow near first pipeline section of bend pipe toward each other measures length range to limit first of formation measuring tube pipeline section,
--third and fourth cramping body is clamped in to flow out near second pipeline section of bend pipe toward each other measures length range to limit second,
--each cramping body has the inside surface that leans against on the measuring tube and away from the outside surface of described inside surface and measuring tube,
--the outside surface of the-the first and the 3rd cramping body has first plane body that is connected thereto, and
--the outside surface of the-the second and the 4th cramping body has second plane body that is connected thereto,
----two plane bodies are threaded togather and are threaded on the cramping body, make first keeper be inserted in the first long side place, and second keeper is inserted in the second long side place,
----relativity body is fixed on two plane bodies, and described relativity body extends and do not extend to top elbows to top elbows along the axis of symmetry,
----inflow side first sensor support member and outflow side second sensor support are fixed on first plane body, the longitudinal axis of described inflow side first sensor support member is parallel to first pipeline section, the longitudinal axis of described outflow side second sensor support is parallel to second pipeline section, and
----inflow side first support and outflow side second support are fixed on second plane body, and the longitudinal axis of described inflow side first support is parallel to described first sensor support member, and the longitudinal axis of described outflow side second support is parallel to described second sensor support,
--top elbows has the seismic stimulation device that is fixed thereon,
---seismic stimulation device is f with relevant natural frequency
3The 3rd vibration mode encourage described pipeline section,
--first speed or displacement transducer are fixed on first pipeline section and the first sensor support member, first sensor support member and second speed or displacement transducer are fixed on second pipeline section and second sensor support, in its present position, if with the 3rd vibration mode excitation pipeline section, had for first and second zero points respectively by deflection from the caused pipeline section of interference of pipeline, and
--described inflow segment and described outflow section be by the carriage support,
--fix a housing on the-carriage, housing is connected on the support by first keeper relative with first speed or displacement transducer and second keeper relative with second speed or displacement transducer respectively.
11. Coriolis mass flow speed sensors as claimed in claim 10, it is characterized in that, first additional materials is fixed near straight first pipeline section of top elbows, produce the node of the 3rd vibration mode herein, and second additional materials is fixed on straight second pipeline section with respect to axis of symmetry symmetry.
12. Coriolis mass flow speed sensors as claimed in claim 10, it is characterized in that, one compensation body is fixed near the relativity body of plane body, and the longitudinal axis of compensation body is perpendicular to the axis of symmetry, and the compensation body and function makes the coriolis mode mobile equilibrium that belongs to the 3rd vibration mode.
13. Coriolis mass flow speed sensors as claimed in claim 10, it is characterized in that, described two plane bodies and described first keeper have first groove along the described axis of symmetry, described two plane bodies, second keeper and relativity body have second groove along symmetrical grooves, form corresponding torsional part.
14. Coriolis mass flow speed sensors as claimed in claim 10 is characterized in that described torsional part is designed to common swivel adapter head.
15. Coriolis mass flow speed sensors as claimed in claim 10 is characterized in that, the first, second, third and the 4th cramping body has equal in quality.
16. Coriolis mass flow speed sensors as claimed in claim 10 is characterized in that, housing is made of the planar metal thin plate and comprises:
-have a preceding thin plate of first mid-plane;
-have a back thin plate of second mid-plane;
-have a top lip of the 3rd mid-plane;
-have first a side thin plate of the 4th mid-plane; And
-have second a side thin plate of the 5th mid-plane,
--the first middle part plane parallel is in described straight first pipeline section,
--the second middle part plane parallel is in described straight second pipeline section,
--in the 3rd facial planes perpendicular to described plane,
--the 4th and the 5th middle part plane parallel is in described plane body, and
--the back thin plate is fastened on the described support by keeper.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00104198A EP1130367B1 (en) | 2000-03-01 | 2000-03-01 | Coriolis mass flow rate/density sensor with a single curved measuring tube |
| EP00104198.7 | 2000-03-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1346048A CN1346048A (en) | 2002-04-24 |
| CN1208601C true CN1208601C (en) | 2005-06-29 |
Family
ID=8167988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011165995A Expired - Fee Related CN1208601C (en) | 2000-03-01 | 2001-02-28 | Quality flow speed/density sensor with single curve measuring tube |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1130367B1 (en) |
| JP (1) | JP3476781B2 (en) |
| CN (1) | CN1208601C (en) |
| AT (1) | ATE253214T1 (en) |
| DE (1) | DE50004243D1 (en) |
| HK (1) | HK1044815A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4565150B2 (en) * | 2003-05-12 | 2010-10-20 | 独立行政法人産業技術総合研究所 | Coriolis flow meter |
| US7325462B2 (en) | 2005-12-22 | 2008-02-05 | Endress + Hauser Flowtec Ag | Measuring transducer of vibration-type |
| DE102005062007A1 (en) * | 2005-12-22 | 2007-06-28 | Endress + Hauser Flowtec Ag | Vibration-type measuring transformer used e.g. as a mass flow measuring device comprises a housing, an inner part arranged in the housing, a curved partially vibrating measuring tube and a counter oscillator |
| US7360451B2 (en) | 2005-12-22 | 2008-04-22 | Endress + Hauser Flowtec Ag | Measuring transducer of vibration-type |
| EP2027440B1 (en) * | 2006-05-01 | 2016-10-05 | Micro Motion, Inc. | A balancing structure for a single curved tube coriolis flow meter |
| DE102008007742A1 (en) | 2007-04-25 | 2008-11-06 | Krohne Ag | Coriolis mass flowmeter |
| DE102009028006A1 (en) * | 2009-07-24 | 2011-01-27 | Endress + Hauser Flowtec Ag | Vibration-type transducers and measuring instrument with such a transducer |
| DE102011114569A1 (en) | 2011-08-16 | 2013-02-21 | Krohne Ag | Coriolis mass flowmeter |
| DE102014119073A1 (en) | 2014-12-18 | 2016-06-23 | Endress+Hauser Flowtec Ag | Vibration-type transducers |
| DE102016109251A1 (en) * | 2016-05-19 | 2017-11-23 | Endress + Hauser Flowtec Ag | Vibration-type transducers |
| CN106197596A (en) * | 2016-06-23 | 2016-12-07 | 大连美天测控系统有限公司 | A kind of reinforcing oil well mud flow meter and mounting bracket and mounting bracket using method |
| CN108871480B (en) * | 2018-07-04 | 2021-03-19 | 韩泽方 | Dynamic sealing hinge tube type coriolis mass flowmeter |
| JP7328832B2 (en) * | 2019-08-30 | 2023-08-17 | 川崎重工業株式会社 | coriolis flow meter |
| DE102022114829A1 (en) | 2022-06-13 | 2023-12-14 | Endress + Hauser Flowtec Ag | Sectionally forced plasma-polished tube arrangement, in particular measuring tube arrangement, measuring sensor with such a measuring tube arrangement and method for plasma polishing a measuring tube arrangement |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4027936A1 (en) * | 1990-09-04 | 1992-03-05 | Rota Yokogawa Gmbh & Co Kg | MASS DISPENSER |
| US5602344A (en) * | 1994-09-01 | 1997-02-11 | Lew; Hyok S. | Inertia force flowmeter |
| DK0871017T3 (en) * | 1997-04-10 | 2008-10-13 | Flowtec Ag | Coriolis mass flow sensor with a measuring tube |
-
2000
- 2000-03-01 DE DE50004243T patent/DE50004243D1/en not_active Expired - Fee Related
- 2000-03-01 AT AT00104198T patent/ATE253214T1/en not_active IP Right Cessation
- 2000-03-01 EP EP00104198A patent/EP1130367B1/en not_active Expired - Lifetime
-
2001
- 2001-02-28 CN CNB011165995A patent/CN1208601C/en not_active Expired - Fee Related
- 2001-03-01 JP JP2001056603A patent/JP3476781B2/en not_active Expired - Fee Related
-
2002
- 2002-08-29 HK HK02106391.0A patent/HK1044815A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP1130367B1 (en) | 2003-10-29 |
| DE50004243D1 (en) | 2003-12-04 |
| JP3476781B2 (en) | 2003-12-10 |
| CN1346048A (en) | 2002-04-24 |
| JP2001241987A (en) | 2001-09-07 |
| HK1044815A1 (en) | 2002-11-01 |
| ATE253214T1 (en) | 2003-11-15 |
| EP1130367A1 (en) | 2001-09-05 |
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